Which of the following is a false statement regarding chiasmata and the time for crossing over?

A) The chiasmata are most visible and can be counted during late prophase 1 of meiosis
B) The chiasmata are the points where the physical exchange of genetic information occurs
C) Crossing over occurs in early to mid prophase 1 before chiasmata can be viewed
D) Crossing over occurs in late prophase at the time chiasmata can be viewed
E) The number of chiasmata is roughly proportional to the chromosome length